html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font: inherit;
	vertical-align: baseline;
}
/* HTML5 display-role reset for older browsers */
article, aside, details, figcaption, figure, 
footer, header, hgroup, menu, nav, section {
	display: block;
}
body {
	line-height: 1;
}
ol, ul {
	list-style: none;
}
blockquote, q {
	quotes: none;
}
blockquote:before, blockquote:after,
q:before, q:after {
	content: '';
	content: none;
}
table {
	border-collapse: collapse;
	border-spacing: 0;
}

html, body {
    height: 100%;
    margin: 0;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

body{
    font-family:Arial, Helvetica, sans-serif;
    overflow-x:hidden;
    background-color:rgb(228, 228, 228);
}

header{
    text-align:center;
    width:100%;
    height:80px;
    background-color:rgb(0, 0, 0);
    color:white;
    font-size:30px;
    display:flex;
    justify-content: center;
    align-items:center;
    box-shadow:0px 0px 2px 0px black;
    font-weight:bold;
}

form{
    background-color:rgb(245, 245, 245);
    width:40%;
    margin:auto;
    margin-top:20px;
    padding:30px;
    border-radius:10px;
    text-align:center;
    border:solid rgb(201, 201, 201) 2px;
}

h1{
    font-size:45px;
    font-weight:bold;
    margin-bottom:30px;
}

h2{
    margin-top:15px;
    font-weight:bold;
    font-size:35px;
}

#value{
    width:7%;
}

footer{
    text-align:center;
    width:100%;
    height:55px;
    background-color:rgb(0, 0, 0);
    color:white;
    font-size:13px;
    display:flex;
    justify-content: center;
    align-items:center;
    box-shadow:2px 0px 0px 0px black;
    font-weight:bold;
}